Eaton Bussmann Series High Speed Fuse 250FM

This Eaton Bussmann Series 250FM High Speed Fuse is a compact and reliable protection solution for semiconductor devices, DC drives, and power converters. Designed to meet strict international standards (BS88, IEC, UL, and CCC), it delivers exceptional performance under demanding electrical conditions. With a breaking capacity of up to 200 kA RMS Sym and superior arc-quenching ability, this fuse ensures safe and efficient circuit protection.

Key Features at a Glance

• Brand: Eaton Bussmann Series

• Model: 250FM

• Fuse Type: High Speed British Standard Fuse, Single Barrel

• Current Rating: 250A

• Voltage Rating: 690 VAC / 450 VDC (IEC), 700 VAC / 500 VDC (UL)

• Class: aR

• Breaking Capacity: 200 kA RMS Sym (IEC/UL)

• DC Breaking Capacity: 40 kA (IEC), 50 kA (UL)

• Standards: BS88 Part 4, IEC 60269-4, UL Recognized, CCC

• Dimensions: 115 mm (W) x 46 mm (D) x 45 mm (H)

• Weight: 226 g

• Compliances: CE Marked, RoHS Compliant

• Watt Losses: 48 W

• Pre-arc (I²t): 5200

• Clearing (I²t): 20500 at 415 V, 37500 at 660 V

• Compatible Accessories: MC-600 Trip Indicator Kit, TI700 Fuse Indicator, MAI/MBI Microswitch Adaptors

Why Choose This Product

Eaton Bussmann’s 250FM fuse is engineered for fast-acting protection, making it ideal for semiconductor and power electronic circuits. Its high interrupting capacity minimizes equipment damage and downtime. Backed by global certifications and robust construction, it offers excellent reliability and thermal performance for industrial applications where precision and safety are non-negotiable.

Ideal For

• Semiconductor protection systems

• DC drives and inverters

• Power converters and rectifiers

• Common DC bus systems

• Industrial control panels and automation setups

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FAQs

Q1. What applications is the Eaton Bussmann 250FM suitable for?
A1. It’s ideal for semiconductor protection, DC drives, rectifiers, and power converters.

Q2. Is the 250FM fuse RoHS and CE compliant?
A2. Yes, it’s fully RoHS compliant and CE marked for safety assurance.

Q3. Can this fuse work with a trip indicator or microswitch?
A3. Yes, it is compatible with the MC-600 kit, TI700 indicator, and MAI/MBI microswitch adaptors.

Download Product Specifications